boost::asio async_read guarantee all bytes are read

Question

I have a server that receives a compressed string (compressed with zlib) from a client, and I was using async_receive from the boost::asio library

Answer 1

How were you expecting to do this using any other method?

There are a few general methods to sending data of variable sizes in an async manor:

1. By message - meaning that you have a header that defines the length of the expected message followed by a body which contains data of the specified length.
2. By stream - meaning that you have some marker (and this is very broad) method of knowing when you've gotten a complete packet.
3. By connection - each complete packet of data is sent in a single connection which is closed once the data is complete.

So can your data be parsed, or a length sent etc...